package com.example.springinit2.controller;

import com.example.springinit2.model.User;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping(value="/users")     // 通过这里配置使下面的映射都在/users下
public class UserController {

  // 创建线程安全的Map
  static Map<Long, User> users = Collections.synchronizedMap(new HashMap<Long, User>());


  @ApiOperation(value="获取用户列表", notes="")
  @RequestMapping(value="/", method=RequestMethod.GET)
  public List<User> getUserList() {
	// 处理"/users/"的GET请求，用来获取用户列表
	// 还可以通过@RequestParam从页面中传递参数来进行查询条件或者翻页信息的传递
	List<User> r = new ArrayList<User>(users.values());
	return r;
  }


  @ApiOperation(value="创建用户", notes="根据User对象创建用户")
  @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User")
  @RequestMapping(value="/", method=RequestMethod.POST)
  public String postUser(@ModelAttribute User user) {
  //public String postUser(@RequestBody User user) {
	// 处理"/users/"的POST请求，用来创建User
	// 除了@ModelAttribute绑定参数之外，还可以通过@RequestParam从页面中传递参数
	users.put(user.getId(), user);
	return "success";
  }


  @ApiOperation(value="获取用户详细信息", notes="根据url的id来获取用户详细信息")
  @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")
  @RequestMapping(value="/{id}", method=RequestMethod.GET)
  public User getUser(@PathVariable Long id) {
	// 处理"/users/{id}"的GET请求，用来获取url中id值的User信息
	// url中的id可通过@PathVariable绑定到函数的参数中
	return users.get(id);
  }


  @ApiOperation(value="更新用户详细信息", notes="根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")
  @ApiImplicitParams({
		  @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long"),
		  @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User")
  })
  @RequestMapping(value="/{id}", method=RequestMethod.PUT)
  public String putUser(@PathVariable Long id, @ModelAttribute User user) {
	// 处理"/users/{id}"的PUT请求，用来更新User信息
	User u = users.get(id);
	u.setName(user.getName());
	u.setAge(user.getAge());
	users.put(id, u);
	return "success";
  }


  @ApiOperation(value="删除用户", notes="根据url的id来指定删除对象")
  @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")
  @RequestMapping(value="/{id}", method=RequestMethod.DELETE)
  public String deleteUser(@PathVariable Long id) {
	// 处理"/users/{id}"的DELETE请求，用来删除User
	users.remove(id);
	return "success";
  }

}